Improvement in ghillvmolds for casting metal



1 dc n E e H. P. BENWELL Chill-Mold for Gasti UNITED sear-E PATENT OFFICE-i:

HENRY n. Brawn L or NEWARK, NEW JERSEY.

' IMPERIOVEMENT m ci-iliL-giwo Lo s,Font-CASHNeMETA-L;-jL

Specification forming part of Letters Patent No. 198,925, datedzJanuary 8,1878; application filed: 1 December 12,1877. r

To all whom it may concern:

Be it known that I, HENRY HOBART BEN- WELL, of the city of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in the Production of Chill-Molds, which may be used for a variety of purposes, whichimprovements are fully set forth in the following specification, reference being had to the accompanyin g drawings.

The obj ect of my invention is to produce sets of molds composed of several parts like Figure 3 (used for certain special purposes) from molds originally made by the use of 'machinists tools, and afterward reproducing new parts thereof, for use when required, by temporarily combining the extra piece L and some parts of the mold with a box, (shown complete at Fig. 1,) thereby enabling me to replace any worn-out part of the mold, always taking care to cast said new parts while the pieces required to form the mold are in good condition, which new parts are in their turn used, in combination with the box, Fig. 1, and the extra piece L, as parts of molds for producing other parts required to make complete molds identically like the originals, and so on indefinitely, being able to reproduce new sets of molds without again requiring the use of machinists tools with their contingent expenses.

I will now show a special application of my system of producing castings from molds and molds from castings combined with the box,

Fig. 1, the castings being temporarily used as a part of a mold for that purpose, whereby I am enabled to produce unlimited quantities of special castings identically alike.

The special castings (for which I will now show the mode of producing the molds used in castmg them) are such as I use in manufacturing metallic bedsteads, 850., and are shown at G,

mold used for said special Figs. 6 and 14, the castings being one of anumber of moldsmade by the same system, and used specially in manufacturing bedsteads, &c.

For illustration, a number of castings, technically known as dovetails, which are cast onto the ends of the angle-iron frame-pieces, and shown at G, Figs. 6 and 14, are cast in the mold shown at Fig. 3, which mold is formed by the pieces F E H, Figs. 4, 9, 12, the dove- .with the upper side downtha t tail part of G, Fig. 6, being formed in the end of H, Fig. 12. The angle-iron frame-piece I beinginserted a suitable distance into the mold,

Fig. 3, at I, and the melted metal, being poured I into the gate M, flows round the angle-iron,

and by its contraction on cooling becomes" firmly attached thereto. Their use is shown at Fig. 14, two of them dovetailing into a cor- 11, and the hot metal being, poured into the open upper end and filled up level, then, when cooled, the piece H will be produced ready for use without any other work or fitting. The box, Fig. 1, is not required for casting this piece H.

I will now suppose it is required to make a new part, E, of the mold, Fig. 3. Ifirstplacethe part F, Fig. 4, inside the box formed of the pieces A B, Figs. 2 and 8, and then place the extra piece or casting L, Fig. 5, inside F, Fig. 4, and cover the box with the two pieces 0 D, Fig. 13, and, having inserted the screw S through the hole W in the cover and attached a nut inside, (tide Figs. 1 and 2,) then pour the metal through the gate N, Fig. 1, and the part E, Figs. 3 and 9, will be produced complete, with the nut attached thereto. I next suppose it is required to make a new part, F, Figs. 3 and 4, which is done by first putting the parts A B, Figs. 2 and 8, of the box together, and inserting in the hole T through the bottom a screw, S, and turn the parts E L, attached together, is, with the nut side downand place them inside the box A B, and with the screw S fasten the part E there in its place, the other piece, L, Fig. 5, (made especially for this purpose,) being attached to E by pins; then put on the covers 0 D, having a screw and nut fixed through the center hole in the upper side, as before, the nut being inside the covers; then pour the melted metal through the gate N, and, when cooled and set, the part F will be produced with its nut attached all complete and ready for use. These screws and their nuts are required, in conjunction with other suitable devices, to aid in attaching the molds temporarily to the ends of the bedstead-frames while casting the dovetails G, Fig. 14, to the ends of said frames.

both ways, and keeps all the new parts identi- Q cal in size with the original molds.

I claim- 1. The combination of a chill-mold composed of several parts, as E F H with acastingproduced by it, as G, as and for the purpose set orth.

2. The combination of a sectional chill-mold, as E F H, and an extra piece, as L, and boxA B C D, Fig. 1, as and for the purpose set forth.

HENRY HOBART BENWELL.

'Witnesses WM. S. HENSON, J OHN D. TOPPIN. 

